首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
If you have ever wondered how an elephant smells, scientists have the answer. Researchers have discovered that African Elephants
If you have ever wondered how an elephant smells, scientists have the answer. Researchers have discovered that African Elephants
admin
2022-01-04
44
问题
If you have ever wondered how an elephant smells, scientists have the answer. Researchers have discovered that African Elephants have the largest number of genes【C1】________smell of any mammal. Given the size of their trunks, and how important it is【C2】________their survival, it is probably unsurprising that an elephant’s nose is not only the longest in the animal kingdom, but also the most effective.
In【C3】________, humans and other primates have a poor sense of smell. "The functions of these genes are not well known,【C4】________they are likely important for the living environment of African elephants," said author Dr Yoshihito Niimura of the University of Tokyo. "【C5】________. an elephant’s nose is not only long but also superior. " The sense of smell is【C6】________to all mammals, and they use it for【C7】________food, finding mates and locating their offspring.
In a study published in Genome Research, scientists【C8】________the 13 mammal species and found that African Elephants have twice the number of smell genes【C9】________dogs and five times more than humans. They have around 2,000 genes alone that are associated with scent. Humans in comparison have just under 400 and some other primates even【C10】________.The study found that 20,000 genes are【C11】________for the sense of smell in mammals, of which around half are functional, but the collections【C12】________for each species. Horses have around 1,000 smell genes, rabbits around 750 and rats about 1,200.
"The large repertoire of elephant (smell) genes might be attributed to elephants’ heavy【C13】________on scent in various contexts, including social【C14】________and reproduction," added Dr Niimura African and Asian elephants possess a【C15】________scent organ behind each eye, and male elephants can produce a special substance during annual mating, which is characterized【C16】________increased aggressiveness. And【C17】________studies have revealed that, African elephants can reportedly【C18】________between two Kenyan ethnic groups—the Maasai, whose young men【C19】________manhood by spearing elephants, and the Kamba, who are agricultural people that【C20】________little threat to elephants through smell.
【C18】
选项
A、utter
B、compare
C、notice
D、distinguish
答案
D
解析
本文介绍的是大象的嗔觉,由上文可知其嗅觉非常灵敏,句末的through smell表明大象可以依靠气味辨别具有威胁性的部族,故选D项distinguish“区分,辨别”,表明大象可以通过气味分辨出两个不同的肯尼亚部族。A项utter“说”。指人的发音、说话。B项compare“比较”,强调对比的动作而不强调结果。C项notice“注意到”,常指看到什么东西,而不是对两个事物进行对比。
转载请注明原文地址:https://kaotiyun.com/show/UNY4777K
0
考研英语二
相关试题推荐
Nowadays,wehavetechnologythat’simprovedsothatwecanbringpeoplebacktolife.Infact,therearedrugsbeingdeveloped
Whichofthefollowingcanbethebesttitleofthispassage?Accordingtothepassage,whydoesadrinkbringseriousresults
Ifbusinessmenaretaxedtoomuch,theywillnolongerbe______toworkhard,withtheresultthattaxrevenuesmightactually
Theauthorbelievesinthepassagethat______.Thepropertitleforthispassageshouldbe______.
Theoppositionpartydemandsthatthosecabinetmemberswhoareinvolvedintherecentscandalshould______.
Einstein,likeothergreatphysicistsbeforehim,workedoutnewtheoriesthatchallengeour______conceptoftheuniverse.
TheUnitedStateshashistoricallyhadhigherratesofmarriagethanthoseofotherindustrializedcountries.Thecurrentannual
MillionsofAmericansandforeignersseeG.I.Joeasamindlesswartoy,thesymbolofAmericanmilitaryadventurism,butthat’
Scientistsoftenstruggletocommunicatethefindingsofresearch.Oursubjectmattercanbetechnicalandnoteasilydigestedb
Itseemstohappenwithdepressingfrequency—sunnyskiesturntorainjustastheweekendarrives.NowSpanishresearcherssayt
随机试题
一国出口商以低于商品正常价值的价格,将商品出口到另一国市场的行为在国际贸易中被称为()
有权直接发布通缉令的机关是
尿激酶具有下列特点:
噬菌体属于
桥梁长度是指()。
据医生介绍,干眼症症状是眼睛干涩、发红、怕光,看东西伴有刺痛感,眼睛容易疲劳。现在很多办公室一族白天在空调房对着电脑,晚上回家一进门就打开空调,很容易得干眼症。所以说,“空调+电脑”是干眼症的双重诱发因素。以下哪项如果为真,最能支持上述结论?()
(2012年上海.A卷.114)《中共中央关于制定国民经济和社会发展第十二个五年规划的建议》要求,“十二五”期间,我国将全面提高信息化水平,实现“三网融合”。这里的“三网”是指()。
设函数f(x)=且λ>0,则∫—∞∞xf(x)dx=________。
Inotifiedhimthatmyaddresshadchanged.
1.(a)Statethemainfunctionofthefollowingdocuments:(i)billoflading(ii)certificateofinsurance(iii)cer
最新回复
(
0
)